For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

_______________General Description

The MAX845 evaluation kit (EV kit) is an assembled and

tested isolated 5V power supply that meets PCMCIA

height requirements. Two demonstration circuits are

provided: a 100mA circuit that uses an industry-stan-

dard 78L05 regulator, and a 40mA circuit that uses a

low-cost zener shunt regulator. Both circuits consist of

a MAX845 IC (in the µMAX package), a low-profile

transformer, a half-wave rectified voltage doubler, and

a regulator.

____________________________Features

o Isolated Power Supply

o Low Profile (for PCMCIA cards)

_________________________Quick Start

The MAX845 EV kit is fully assembled and tested.

Follow the steps below to verify board operation. Do

not turn on the power supply until all connections

are completed. The circuit on the top half of the board

can provide up to 100mA. The circuit on the lower half

of the board can provide up to 40mA.

1) Connect a 4.5V to 5.5V supply to the pad marked

+5V IN. The power-supply ground return connects

to the GND pad.

2) Connect a voltmeter and load (if any) to the +5OUT

pad. The load ground return connects to the ISO

GND pad.

3) Turn on the power and verify that the output is 5V

±5%.

4) To evaluate shutdown, cut the trace connecting SD

MAX845 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

1

PART

TEMP. RANGE

BOARD TYPE

MAX845EVKIT-MM

0°C to +70°C

Surface Mount

QTY

DESCRIPTION

C11-C14,

C21-C24

8

D11, D12

2

D21

1

Series-connected dual Schottky diodes

Central Semiconductor CMPSH-3S

R22

1

U11, U21

2

Maxim MAX845EUA

U12

1

T11, T21

2

Z21

1

51

Ω 1206 resistor

Motorola MBR0520L Schottky diodes

0.1µF ceramic 1206 capacitors

SUPPLIER

PHONE

FAX

Central

Semiconductor

(516) 435-1110

(516) 435-1824

DESIGNATION

78L05 in surface-mount 8-pin SOIC

1:1:1 low-profile transformer

Halo TGM-010P3

5.1V, 5% zener in SOT-23

Central Semiconductor CMPZ5231B

Halo Electronics

(415) 969-7313

(415) 367-7158

Motorola

(602) 244-5303

(602) 244-4015

____________________Component List

______________Component Suppliers

______________Ordering Information

19-0372; Rev 4; 10/97